(Washington, DC)  --  The federal government won't allow state-licensed marijuana growers to use federally-controlled water on their crops.  That announcement came yesterday from the U.S. Bureau of Reclamation.  Agency spokesman Dan DuBray says the bureau is "obligated to adhere to federal law in the conduct of its responsibilities to the American people."  Pot growers in Washington may feel the impact of the ruling more than their counterparts in Colorado, as the Bureau of Reclamation controls about two-thirds of the water used for irrigated land in Washington state.